CN115013421B

CN115013421B - Folding mechanism and terminal equipment

Info

Publication number: CN115013421B
Application number: CN202111434016.XA
Authority: CN
Inventors: 张伟; 封蕾; 姚文星; 魏亚蒙
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2023-04-14
Anticipated expiration: 2041-11-29
Also published as: EP4215767A4; EP4215767A1; WO2023093226A1; CN115013421A

Abstract

The application provides a folding mechanism and terminal equipment, and relates to the technical field of terminals. The folding mechanism includes: the device comprises a base, a support body, a first swing arm and a second swing arm; the supporting body is connected to the base, the supporting body can move towards or away from the base, and a first groove and a second groove which correspond to each other in position are formed in the supporting body; the first swing arm comprises a first rotating part and a first rotating body fixed on the first rotating part, a part of the first rotating body extends into the first groove, and the first rotating body is configured to provide acting force for the supporting body in the rotating process so as to enable the supporting body to move towards or away from the base; the second swing arm includes that the second rotates the portion and is fixed in the second and rotates the second rotor on the portion, and the part of second rotor stretches into to the second inslot, and the configuration of second rotor is for the supporter provides the effort at the pivoted in-process to make the supporter move towards or keep away from the base. The application can reduce the occupied space of the folding mechanism in the thickness direction of the foldable mobile phone.

Description

Folding mechanism and terminal equipment

Technical Field

The application relates to the technical field of terminals, in particular to a folding mechanism and a terminal device.

Background

With the progress of science and technology and the coming of the era of large-screen intelligent terminals, foldable mobile phones are produced in order to solve the problems of large size, inconvenience in carrying and small screen of the mobile phones.

The foldable mobile phone comprises a shell, a folding mechanism and a flexible screen, wherein the folding mechanism comprises a rotating arm, a lifting door panel and a spring, when the foldable mobile phone is in a flat state, the upper surface of the lifting door panel is kept flush with the upper surface of the rotating arm under the action of the rotating arm, so that the flexible screen can be supported by the lifting door panel and the rotating arm together; in the folding process of the foldable mobile phone, the rotating arm compresses the spring, and the spring drives the lifting door plate fixed with the spring to descend, so that a round angle generated when the flexible screen is folded is avoided.

Because the spring and the rotating arm are mainly adopted to realize the descending of the lifting door plate in the related technology, but the spring still needs to occupy a certain space when being compressed to the maximum compression amount, and the axial direction of the spring is the same as the thickness direction of the foldable mobile phone, so that the folding mechanism occupies a larger space in the thickness direction of the foldable mobile phone.

Disclosure of Invention

In order to solve the technical problem, the application provides a folding mechanism and a terminal device, which can reduce the occupied space of the folding mechanism in the thickness direction of a foldable mobile phone.

The application provides a folding mechanism, includes: a base; the supporting body is connected to the base and can move towards or away from the base, and a first groove and a second groove which correspond to each other in position are formed in the supporting body; the first swing arm comprises a first rotating part and a first rotating body fixed on the first rotating part, the first rotating part is rotatably connected to the base, part of the first rotating body extends into the first groove, and the first rotating body is configured to provide acting force for the supporting body in the rotating process so as to enable the supporting body to move towards or away from the base; the second swing arm, the second swing arm includes that the second rotates the portion and is fixed in the second and rotates the second rotor on the portion, the second rotates the portion and connects on the base with rotatable mode, the part of second rotor stretches into to the second inslot, the second rotor configuration is at the pivoted in-process, provides the effort for the supporter to make the supporter move towards or keep away from the base.

In this application, first swing arm and second swing arm can be folded or expand, and at the in-process that first swing arm and second swing arm expanded, first swing arm and second swing arm can provide the effort for the supporter to make the supporter keep away from the base motion, that is to say, the supporter can rise. When folding mechanism was applied to terminal equipment, the supporter can provide the support for the flexible screen jointly with first swing arm and second swing arm. At first swing arm and the folding in-process of second swing arm, first swing arm and second swing arm can provide the effort for the supporter moves towards the base, that is to say, the supporter can descend, thereby dodge the fillet that produces when flexible screen buckles. It can be seen that the folding mechanism of this application to need not use the spring, also need not reserve the required space of spring when compressing to the limit, that is to say, this application embodiment can save the space in the folding mechanism thickness direction to further reduce terminal equipment's thickness.

In addition, because the part of first rotor stretches into first inslot, consequently, no matter first swing arm and second swing arm are in the flattening state, and still folding state, first rotor all can provide the spacing along terminal equipment thickness direction for the supporter to restricted the displacement of supporter along thickness direction, and then reduced the condition that causes flexible screen or other parts of terminal equipment to damage because of the supporter produces great displacement.

In some possible implementations, the support body includes a first fixing plate and a second fixing plate disposed opposite to each other and a third fixing plate connected between the first fixing plate and the second fixing plate, the third fixing plate dividing a space between the first fixing plate and the second fixing plate into a first groove and a second groove. The supporting body can be formed by adopting an integrally formed structure or welding a first fixing plate, a second fixing plate and a third fixing plate. The support body has a simpler structure.

In some possible implementation manners, the second fixing plate is closer to the base than the first fixing plate, a size of the second fixing plate in the first direction is larger than a size of the first fixing plate in the first direction, and the first direction is an arrangement direction of the first swing arm and the second swing arm. Thus, in the process of folding the first swing arm and the second swing arm, the first fixing plate can provide enough space for the rotation of the first rotating body, and the first fixing plate is prevented from interfering with the first swing arm.

In some possible implementations, the first fixation plate has a first surface facing the second fixation plate; the first rotating body comprises a first acting surface which is abutted against the first surface when the first swing arm and the second swing arm are in a flattening state. Therefore, the first action surface can always provide acting force for the first surface in the process of unfolding the first swing arm and the second swing arm and in the flattening state of the first swing arm and the second swing arm.

In some possible implementations, the second fixation plate has a second surface facing the first fixation plate; the first rotating body further comprises a second acting surface connected with the first acting surface, and the second acting surface acts with the second surface in the folding process of the first swing arm and the second swing arm. Therefore, in the process of folding the first swing arm and the second swing arm, the second action surface can provide acting force for the second surface so as to enable the support body to move towards the base.

In some possible implementations, the first active surface includes a first plane. When the first swing arm and the second swing arm are unfolded and are in a flattening state, the first action surface needs to continuously provide acting force for the first surface, and when the first action surface comprises a plane, the plane can provide acting force for the first surface, so that the first rotating body can provide stable support for the supporting body.

In some possible implementations, the second active surface includes a second plane, the second plane is connected to the first active surface, and the second plane abuts against the second surface when the first swing arm and the second swing arm are in the folded state. Therefore, when the first swing arm and the second swing arm are in a folding state, the second plane can provide acting force for the second surface, and therefore the first rotating body can provide stable support for the supporting body.

In some possible implementations, the second active surface further includes a first cambered surface connected with the second plane and protruding outward. In the process that first swing arm and second swing arm are folding, first cambered surface and second surface interact, reducible condition that jolts in the in-process of motion that leads to the supporter because of the face of unevenness from this, that is to say, can make the supporter motion steady.

In some possible implementations, the second active surface further includes a third plane connected to the first arc surface, and the third plane is further configured to abut a portion of the third plane with the second surface when the first swing arm and the second swing arm are in the flattened state. In this way, the third plane can provide stable support for the support body.

In some possible implementation manners, the first action surface and the second action surface are connected to form a second arc surface, and the second arc surface and the second surface act in the process of folding the first swing arm and the second swing arm; in the process of unfolding the first swing arm and the second swing arm, the second cambered surface acts on the first surface. Therefore, in the process of unfolding the first swing arm and the second swing arm, the second cambered surface always acts with the first surface; in the process of folding the first swing arm and the second swing arm, the second cambered surface always acts on the second surface. The cambered surface has the characteristic of smooth surface, so that the support body can move more stably.

In some possible implementations, the first rotating body includes a connecting member and a fixing member fixed to the connecting member, at least a portion of the fixing member extends into the first groove, and the fixing member is configured to provide a force to the supporting body toward or away from the base during the rotation. Therefore, in the process that the first swing arm and the second swing arm are unfolded or folded, the fixing piece can always provide acting force for the supporting body so that the supporting body is far away from or moves towards the base.

In some possible implementations, the connecting member is located at a side of the supporting body, and the fixing member is disposed toward the side, which is a surface adjacent to a side where the first swing arm is located. When the connecting piece is positioned on the side surface, the fixing piece can extend into the first groove from the side surface.

In some possible implementations, a first side surface of the first rotating portion is provided with a first cut, a portion of the first rotating body extends into the first cut, and the first side surface is a surface of the first rotating portion opposite to the second rotating portion when the first swing arm and the second swing arm are in the flattened state. In this way, the lateral dimension of the first swing arm can be reduced, and since the lateral dimension of the first swing arm is the same as the width direction of the terminal device, the dimension of the folding assembly in the width direction of the terminal device can be further reduced. Further, the size of the first rotating body in the width direction of the terminal device can be increased, thereby improving the strength of the first rotating body.

In some possible implementations, the first cut has two opposing side walls, and the first rotating body is fixed to the two side walls. The fixing structure of the first rotating body on the first rotating part is simple.

In some possible implementations, the first fixing plate includes a fixing body and a protrusion fixed to one side of the fixing body, and a portion of the protrusion extends into the first cutout. In this way, the dimension of the support body in the terminal device width direction can be further increased, and the dimension of the entire folding mechanism in the terminal device width direction can be reduced. Because the first groove and the second groove are formed in the supporting body, the strength of the supporting body can be improved to a certain extent, and the situation that the thickness of a third connecting plate between the first groove and the second groove is small due to the fact that the size of the supporting body in the width direction of the terminal device is small, and cracks occur in the supporting body when the supporting body is stressed is reduced.

In some possible implementations, a first through hole is provided at a second side surface of the first rotating portion, the second side surface being adjacent to the first side surface, the first cutout being in communication with the first through hole; the first rotating body is also provided with a connecting surface facing the first through hole, and the projection of the connecting surface on the side wall is in contact with or provided with a gap between the projection edges of the side wall of the first through hole. When the folding mechanism is applied to the terminal equipment, the folding mechanism further comprises a first rotating shaft, the first rotating shaft is connected to the base in a rotatable mode, and the first swing arm is fixed to the first rotating shaft. Because when equipment terminal equipment, can make first swing arm earlier, assemble first swing arm and first pivot next, consequently, connect the projection part of face at the lateral wall, contact or have the clearance with first through-hole between the edge of the projection of lateral wall, can make the assembly comparatively convenient. Further, the dimension of the first rotating body in the width direction of the terminal device can be further increased, and therefore the strength of the first rotating body can be improved.

In some possible implementation manners, the number of the first rotating bodies is multiple, the number of the first grooves is multiple, and at least two first rotating bodies are in one-to-one correspondence with the two first grooves; and/or the number of the second rotating bodies is multiple, the number of the second grooves is multiple, and at least two second rotating bodies are in one-to-one correspondence with the two second grooves. In this way, the plurality of first rotating bodies can provide a more stable acting force to the supporting body, thereby making the movement of the supporting body more smooth. The plurality of second rotating bodies can also provide more stable acting force for the supporting body, so that the movement of the supporting body is more stable.

In some possible implementations, the folding mechanism further includes a third swing arm connected to the base in a slidable manner along the arc surface, the third swing arm being arranged with the first swing arm along the second direction, and the third swing arm being connected to the first swing arm such that the third swing arm moves relative to the base in a synchronized manner with the first swing arm; and/or the folding mechanism also comprises a fourth swing arm which is connected to the base in a manner of sliding along the cambered surface; the fourth swing arm and the second swing arm are arranged along a second direction and are connected so as to enable the fourth swing arm to move relative to the base in a synchronous mode with the second swing arm; the second direction is perpendicular to both the moving direction and the first direction of the support body. Like this, first swing arm and third swing arm, and second swing arm and fourth swing arm can provide the support for the flexible screen jointly, and the supporting area of multiplicable folding mechanism to the flexible screen from this to further improve the support intensity to the flexible screen. In addition, because first swing arm and third swing arm keep synchronous motion all the time, second swing arm and fourth swing arm keep synchronous motion all the time, consequently, at the folding or in-process that expandes of terminal equipment, can keep the flexible screen all the time and have higher roughness to can improve the life of flexible screen.

In some possible implementation manners, a first sliding groove is formed on the surface of the third swing arm facing the first swing arm; the first swing arm further comprises a third rotating portion fixed on the first rotating portion and a first connecting shaft connected to the third rotating portion in a rotatable mode, and the first connecting shaft extends into the first sliding groove. Like this, at first swing arm around first pivot pivoted in-process, the third rotation portion can drive the third swing arm through first connecting axle for the third swing arm keeps synchronous rotation with first swing arm all the time.

In some possible implementation manners, a second sliding groove is formed in the surface, facing the second swing arm, of the fourth swing arm; the second swing arm further comprises a fourth rotating portion fixed on the second rotating portion and a second connecting shaft connected to the fourth rotating portion in a rotatable mode, and the second connecting shaft extends into the second sliding groove. The second swing arm can be connected to the base through a second rotating shaft (another rotating shaft parallel to the first rotating shaft), and the fourth rotating portion can drive the fourth swing arm through the second connecting shaft in the process that the second swing arm rotates around the second rotating shaft, so that the fourth swing arm always keeps synchronous rotation with the second swing arm.

In some possible implementations, the first swing arm and the second swing arm are symmetrical with respect to a center plane of the support body, and the center plane is a plane perpendicular to the first direction and located at the geometric center of the support body. In this way, the supporting points provided by the first swing arm and the second swing arm for the supporting body correspond, so that the motion stability of the supporting body can be further improved.

The application provides a terminal device, including any one of the above-mentioned folding mechanism. The terminal equipment can realize all the effects of the folding mechanism.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1a is a schematic structural diagram of a foldable mobile phone provided in an embodiment of the present application in a half-folded state;

fig. 1b is a schematic structural diagram of a foldable mobile phone provided in an embodiment of the present application in a flat state;

FIG. 2 is a schematic diagram of an assembly structure of a housing and a folding mechanism provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a folding mechanism provided in an embodiment of the present application;

FIG. 4 is a schematic view of the folding mechanism shown in FIG. 3 in a disassembled configuration;

FIG. 5 is a partial schematic view of a base of the folding mechanism shown in FIG. 3;

FIG. 6a is a schematic perspective view of a first rotating shaft of the folding mechanism shown in FIG. 3;

FIG. 6b is a side view of the first shaft shown in FIG. 6 a;

FIG. 7 is a schematic view of the support and base of the folding mechanism shown in FIG. 3, shown disassembled;

FIG. 8 is a schematic diagram of an assembly structure of the supporting body and the torsion arm in the folding mechanism shown in FIG. 3;

FIG. 9 is a schematic perspective view of a torsion swing arm in the folding mechanism shown in FIG. 3;

fig. 10a is a cross-sectional view of the torsional swing arm of fig. 9 taken along direction BB;

fig. 10b is an enlarged partial view of the torsion swing arm shown in fig. 10a at C;

FIG. 11a is a cross-sectional view of the folding mechanism shown in FIG. 3 taken along direction AA;

FIG. 11b is an enlarged partial schematic view at D of the cross-sectional view of FIG. 11 a;

FIG. 11c is a schematic view of the folding mechanism shown in FIG. 3 at a folding angle of 100;

FIG. 11d is an enlarged partial view of the structure of FIG. 11c at H;

FIG. 11e is a schematic view of the folding mechanism shown in FIG. 3 in a folded state;

FIG. 11f is an enlarged view of a portion of the structure of FIG. 11e at I;

FIG. 12 is another schematic view of the folding mechanism of FIG. 3 in a folded configuration;

FIG. 13 is an enlarged partial view of a torsional pendulum arm according to another embodiment of the present application;

FIG. 14a is a schematic view of a folding mechanism in a flat state according to another embodiment of the present application;

FIG. 14b is a schematic view of a folded configuration shown at a 100 folding angle in another embodiment of the present application;

FIG. 15a is a schematic view of a folding mechanism according to yet another embodiment of the present application;

FIG. 15b is an enlarged partial schematic view of the folding mechanism shown in FIG. 15 a;

FIG. 16 is a schematic view showing the structure of a support in still another embodiment;

FIG. 17 is a schematic view of a torsion arm according to still another embodiment;

fig. 18 is a schematic view of a folded structure in a flattened state according to still another embodiment.

Icon: 10-a housing; 11-through slots; 20-a folding mechanism; 21-a base; 211-a base plate; 2111-accommodating grooves; 2112-backplane card slot; 2113-bottom wall; 2114-card slot side wall; 2115-bottom wall of card slot; 212-a mount; 213-a barrier; 214-a positioning section; 22-a main swing arm; 221-arm plate; 222-a first clamping portion; 2221-card section card slot; 2223-a protruding site; 223-a second clamping part; 2231-a chute; 23-a synchronization mechanism; 231-a gear; 232-a first rotating shaft; 2321-spindle cut-out; 233-second shaft; 24-a support; 241-an upper fixing plate; 2411-fixing the body; 2412-a boss; 2413-lower surface; 242-lower fixing plate; 2421 — upper surface; 243-vertical fixing plate; 2431-positioning holes; 244-side fixing plate; 245-a containment chamber; 246-groove; 25-torsion swing arm; 251-a first rotating portion; 2511-a first via; 2512-turning section cut; 2513-a first side surface; 2514-a second side surface; 2515-side of incision; 252-a rotor; 2521-a first active surface; 2522-a second active surface; 2523-first connection face; 2524-a third connection face; 2525-a first plane; 2526-circular arc surface; 2527-a second plane; 2528-a second connection face; 2529-a connector; 2530-fixed column; 253-a second rotating part; 2531-a second via; 254-a connecting plate; 255-a connecting shaft; 30-a flexible screen; e-length direction; f-width direction; g-thickness direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second," and the like, in the description and in the claims of the embodiments of the present application are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first target object and the second target object, etc. are specific sequences for distinguishing different target objects, rather than describing target objects.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of processing units refers to two or more processing units; the plurality of systems refers to two or more systems.

The embodiment of the application provides a folding mechanism, and the folding mechanism can be applied to a foldable mobile phone. The folding mechanism can also be applied to terminal equipment with a folding function, such as a foldable tablet pErsonal computer, a foldable game machine, a foldable PErsonal DiGital Assistant (PDA), and the like. The embodiment of the present application does not limit the specific form of the terminal device.

As shown in fig. 1a and 1b, the foldable mobile phone can be folded along its center, and when the foldable mobile phone is in a folded state, i.e., the folding angle of the foldable mobile phone is 0, the size of the foldable mobile phone can be reduced; when the foldable mobile phone is in a flat state, that is, the folding angle of the foldable mobile phone is 180 °, the flexible screen 30 is in a state of a maximum display area, and at this time, a user can perform an operation on the flexible screen 30. It should be noted that the folding angle refers to an included angle between the left and right parts of the foldable mobile phone.

To facilitate clear description of the technical solution of the embodiment of the present application, as shown in fig. 2, three directions may be defined, which are a length direction E (second direction) of the foldable mobile phone, a width direction F (first direction) of the foldable mobile phone, and a thickness direction G of the foldable mobile phone.

In addition, in the present embodiment, "up", "down", "left" and "right" refer to the foldable cellular phone in a flattened state, and the orientation is determined with the user's hand as a reference when the user holds the foldable cellular phone with both hands and the flexible screen 30 is oriented toward the user.

As shown in fig. 2, the foldable cellular phone includes a housing 10, a folding mechanism 20, and a flexible screen 30 (not shown in fig. 2), wherein a side surface of the housing 10 is provided with a through groove 11, and the folding mechanism 20 is connected to the through groove 11. The flexible screen 30 is fixed to one side surface of the housing 10 on which the through groove 11 is provided.

As shown in fig. 3, the folding mechanism 20 includes: a base 21, two main swing arms 22, a synchronizing mechanism 23, a support body 24 and two torsion swing arms 25. In the present embodiment, as shown in fig. 2, the number of the folding mechanisms 20 may be two, and two folding mechanisms 20 are respectively disposed at two ends of the housing 10.

In other embodiments of the present application, the number of the folding mechanisms 20 may be one, three, or more, and when the number of the folding mechanisms 20 is one, one folding mechanism 20 may be disposed at the middle of the base 21 in the length direction E; when the number of the folding mechanisms 20 is plural, the plural folding mechanisms 20 may be evenly distributed along the length direction E.

As shown in fig. 4, the base 21 includes a bottom plate 211, a mount 212, a blocking portion 213, and a positioning portion 214.

As shown in fig. 2, the bottom plate 211 is fixed in the through groove 11 of the housing 10. As shown in fig. 4, the bottom plate 211 has a receiving groove 2111, and a bottom wall 2113 of the receiving groove 2111 is flat.

As shown in fig. 4, the mounting seat 212 is fixed in the receiving groove 2111. As shown in fig. 5, a bottom board slot 2112 is disposed on a side of the mounting seat 212 away from the bottom board 211. Two opposite slot side walls 2114 of the backplane slot 2112 are provided with a blocking portion 213, a gap is provided between the two blocking portions 213, and a gap is also provided between the slot bottom wall 2115 and the blocking portion 213. The surface of the blocking portion 213 facing the slot bottom wall 2115 is a circular arc surface. The number of backplane card slots 2112 may be two, and the two backplane card slots 2112 are staggered on the base 21.

As shown in fig. 5, the positioning portion 214 is fixed to the bottom wall 2113 of the base 21, and the projection shape of the positioning portion 214 on the bottom wall 2113 may be circular. In other embodiments of the present application, the projection of the positioning portion 214 on the bottom wall 2113 may be square or rectangular.

As shown in fig. 5, in the present embodiment, the number of the positioning portions 214 may be one. In other embodiments of the present application, the number of the positioning portions 214 may be multiple. When the number of the positioning portions 214 is plural, the plural positioning portions 214 may be arranged along a straight line, in a triangular shape, in a rectangular shape, or the like.

As shown in fig. 2, two swing main arms 22 are adjacently disposed side by side in the width direction F, and both swing main arms 22 are rotatably connected to the base 21.

As shown in fig. 4, the main swing arm 22 includes an arm plate 221, a first clamping portion 222, and a second clamping portion 223, and the first clamping portion 222 and the second clamping portion 223 are fixed to a surface of the arm plate 221 facing the base 21.

As shown in fig. 4, a surface of the first locking portion 222 facing the base 21 is a circular arc surface, two end surfaces of the first locking portion 222 extend inward to form a locking portion locking slot 2221, a protruding portion 2223 is formed on the first locking portion 222, the protruding portion 2223 can be accommodated in the bottom board locking slot 2112, and a surface of the protruding portion 2223 facing the arm plate 221 is a circular arc surface. The stop portion 213 of the base 21 can be received in the card slot 2221, and the surface of the projection 2223 facing the arm plate 221 abuts against the surface of the stop portion 213 facing the bottom wall 2115 of the card slot. Thus, the main swing arm 22 can be connected to the base 21 through the protruding portion 2223. Since the surface of the blocking portion 213 facing the bottom wall 2115 of the slot and the surface of the protruding portion 2223 facing the arm plate 221 are both arc surfaces, the main swing arm 22 will move along the arc surfaces of the blocking portion 213 during the folding or unfolding process of the foldable mobile phone.

As shown in fig. 4, a sliding groove 2231 extending through to the other end surface is provided in one end surface of the second clamping portion 223, the sliding groove 2231 is in a track shape, specifically, a middle portion of the sliding groove 2231 is rectangular, two ends thereof are semicircular, and the semicircular shapes at the two ends are adjacent to two opposite sides of the rectangle.

As shown in fig. 4, the synchronizing mechanism 23 includes four gears 231, two first rotating shafts 232 and two second rotating shafts 233, the four gears 231 are sequentially arranged in the width direction F of the foldable mobile phone, and every two adjacent gears 231 of the four gears 231 are engaged with each other. The two gears 231 located in the middle of the four gears 231 may be slightly lower than the two gears 231 located at the edges. The four gears 231 have the same overall dimension, so that the four gears 231 can always rotate synchronously in the rotating process when the foldable mobile phone is folded or unfolded.

As shown in fig. 4, the two first rotating shafts 232 are parallel to each other and are rotatably connected to the base 21, and two gears 231 located at the edge of the four gears 231 are respectively fixed to the two first rotating shafts 232, that is, one gear 231 of the two gears 231 located at the edge is fixed to one first rotating shaft 232, and the other gear 231 is fixed to the other first rotating shaft 232.

As shown in fig. 6a, a rotation shaft notch 2321 is formed in an end surface of the first rotation shaft 232 extending inward, a dimension of the rotation shaft notch 2321 along the length direction E of the foldable phone is smaller than the length of the first rotation shaft 232, and a projection of the gear 231 on the first rotation shaft 232 does not overlap with the rotation shaft notch 2321. As shown in fig. 6b, in the embodiment of the present application, the number of the rotation shaft notches 2321 may be two, and the two rotation shaft notches 2321 are uniformly arranged along the circumferential direction of the first rotation shaft 232. In other embodiments of the present application, the number of the shaft cutouts 2321 may be one, or three.

It should be noted that, when the number of the folding mechanisms 20 is plural, the first rotating shafts 232 in the respective folding mechanisms 20 may be fixed to each other. Specifically, the plurality of first rotating shafts 232 may be integrated into a single structure, so that the synchronizing mechanisms 23 of the folding mechanisms 20 can be rotated synchronously as much as possible, thereby increasing the stability of the folding process of the foldable mobile phone.

Both of the second rotating shafts 233 are rotatably coupled to the base 21, and as shown in fig. 4, of the four gears 231, two gears 231 located in the middle are fixed to the two second rotating shafts 233, respectively. That is, one gear 231 of the two gears 231 located in the middle is fixed to one second rotating shaft 233, and the other gear 231 is fixed to the other second rotating shaft 233. The length of the second rotary shaft 233 is smaller than that of the first rotary shaft 232.

As shown in fig. 3, the support 24 is attached to the base 21. As shown in fig. 7, the supporting body 24 includes an upper fixing plate 241, a lower fixing plate 242, and a vertical fixing plate 243. The upper and

lower fixing plates

241 and 242 are parallel to each other, the vertical fixing plate 243 is fixed between the upper and

lower fixing plates

241 and 242, and the vertical fixing plate 243 is perpendicular to both the upper and

lower fixing plates

241 and 242.

In this embodiment, the supporting body 24 may be formed by welding an upper fixing plate 241, a lower fixing plate 242 and a vertical fixing plate 243, and the vertical fixing plate 243 may divide the space between the upper fixing plate 241 and the lower fixing plate 242 into two grooves 246; alternatively, the support body 24 may be formed by casting, and then the grooves 246 may be formed on the opposite side surfaces of the support body 24 (as shown in fig. 7).

As shown in fig. 8, the upper fixing plate 241 may have a cross-shaped plate surface, and specifically, the upper fixing plate 241 includes a fixing body 2411 and two protrusions 2412 respectively located at two sides of the fixing body 2411.

As shown in fig. 7, the lower fixing plate 242 may have a rectangular parallelepiped shape, and the lower fixing plate 242 is closer to the base 21 than the upper fixing plate 241. The lower fixing plate 242 may have a greater dimension in the width direction F than the length direction E. Since the lower fixing plate 242 is closer to the base 21 and does not contact or connect with the flexible screen 30, and there is no need to provide support for the flexible screen 30, the dimension of the lower fixing plate 242 along the length direction E can be smaller than the dimension of the upper fixing plate 241 along the length direction E, so that the weight of the lower fixing plate 242 can be reduced, thereby reducing the weight of the foldable mobile phone.

As shown in fig. 7, the dimension of the vertical fixing plate 243 in the length direction E of the foldable handset may be smaller than or equal to the dimension of the upper fixing plate 241 in the length direction E of the foldable handset, so that the weight of the vertical fixing plate 243 can be reduced as much as possible while the connection strength between the upper fixing plate 241 and the lower fixing plate 242 is satisfied.

As shown in fig. 7, the lower fixing plate 242 is provided with a positioning hole 2431, and the positioning portion 214 of the base 21 can be positioned in the positioning hole 2431, so that the supporting body 24 can slide along the thickness direction G of the foldable mobile phone after being connected to the base 21. The positioning portion 214 can provide lateral positioning for the support 24 when the foldable phone is folded or unfolded, thereby reducing the occurrence of excessive lateral displacement of the support 24 during the folding or unfolding process of the foldable phone.

As shown in fig. 7, the positioning hole 2431 is adapted to the positioning portion 214, that is, the shape of the positioning hole 2431 may be the same as the cross-sectional shape of the positioning portion 214, and for example, when the cross-sectional shape of the positioning portion 214 is a circle, the positioning hole 2431 is also a circular hole. In addition, the fit relationship between the positioning portion 214 and the positioning hole 2431 may be a clearance fit. The cross-sectional shape of the positioning portion 214 is a planar shape taken along a cross-sectional plane perpendicular to the thickness direction G of the foldable cellular phone.

As shown in fig. 7, the number of the positioning holes 2431 is the same as the number of the positioning portions 214, and the arrangement positions correspond to one another. When the number of the positioning portions 214 is one, the number of the positioning holes 2431 is also one, and since the size of the lower fixing plate 242 in the length direction E of the foldable mobile phone is small in the embodiment of the present application, only one set of the positioning portions 214 and the positioning holes 2431 is provided, so that the function of positioning the supporting body 24 in the transverse direction can be realized. In other embodiments of the present application, the number of the positioning portions 214 and the positioning holes 2431 may be multiple, and the positioning holes 2431 may also be arranged in a triangle or rectangle, so as to further improve the lateral positioning effect of the positioning portions 214 on the supporting body 24.

As shown in fig. 3, two torsion swing arms 25 are arranged in the width direction F of the foldable cellular phone.

As shown in fig. 9, the torsion swing arm 25 includes a first rotating portion 251, a rotating body 252, a second rotating portion 253, a connecting plate 254, and a connecting shaft 255, wherein the connecting plate 254 is fixed between the first rotating portion 251 and the second rotating portion 253, and the rotating body 252 is fixed on the first rotating portion 251. As shown in fig. 3, the first rotating portion 251 is fixed to the first rotating shaft 232, and the second rotating portion 253 is connected to the main swing arm 22 through a connecting shaft 255 (not shown in fig. 3).

The first rotating portion 251 is fixed to the first rotating shaft 232 at a position having a shaft notch 2321. As shown in fig. 9, a first through hole 2511 is provided on an end surface of the first rotating portion 251, and the first through hole 2511 is loosely fitted to the first rotating shaft 232 shown in fig. 4. The rotation shaft notch 2321 may be disposed inward from the first rotation shaft 232 toward the side of the support body 24, and since the first rotation shaft 232 and the support body 24 are disposed generally in the width direction F of the terminal device, this solution can reduce the size of the first rotation shaft 232 in the width direction F of the terminal device, thereby reducing the width of the terminal device.

As shown in fig. 11c, since the first rotating shaft 232 is rotatably connected to the base 21, during the folding or unfolding process of the foldable mobile phone, the first rotating shaft 232 can rotate around its axis, and the torsion swing arm 25 can rotate along with the first rotating shaft 232. Since the two gears 231 located at the edge of the synchronizing mechanism 23 are respectively fixed on the two first rotating shafts 232, and the four gears 231 rotate synchronously, the two first rotating shafts 232 also rotate synchronously, and the two torsion swing arms 25 respectively fixed on the two first rotating shafts 232 also rotate synchronously.

As shown in fig. 9 and 10a, the first side surface 2513 of the first rotating portion 251 is provided with a rotating portion notch 2512 extending inward, and the rotating portion notch 2512 communicates with the first through hole 2511.

As shown in fig. 9, a second through hole 2531 is penetratingly formed on the second side surface 2514 of the second rotating portion 253, and the second through hole 2531 may be a circular hole. As shown in fig. 3, the second rotating portion 253 is further away from the base 21 than the first rotating portion 251.

As shown in fig. 9, both ends of the connection plate 254 are fixed to the first and second

rotating portions

251 and 253, respectively. The connection plate 254, the first rotation portion 251, the second rotation portion 253, and the rotation body 252 may be integrally formed or separately formed. When the integral forming method is adopted, the whole torsion swing arm 25 can be manufactured by a casting method. When the torsion swing arm 25 is manufactured by separate molding, the first rotating portion 251, the second rotating portion 253, the connecting plate 254, and the rotating body 252 may be manufactured separately, and the four components may be welded to form the torsion swing arm 25.

As shown in fig. 4, one end of the connecting shaft 255 is rotatably connected to the second rotating portion 253, and the other end is slidably connected in the slide groove 2231 of the second catching portion 223 of the main swing arm 22. When the foldable mobile phone is in a flat state, the connecting shaft 255 is located at a far end position far away from the center of the base 21 in the sliding groove 2231; during the folding process of the foldable mobile phone, the torsion swing arm 25 rotates around the first rotating shaft 232, and the main swing arm 22 moves along the arc surface of the blocking portion 213, so that the actual movement of the main swing arm 22 is swing, and for example, the right main swing arm 22 slides to the right during the counterclockwise rotation. The distance between the distal end of the sliding slot 2231 of the main swing arm 22 and the first rotating shaft 232 gradually increases, while the distance between the connecting shaft 255 and the first rotating shaft 232 is constant, so that, as shown in fig. 12, during the movement of the torsion swing arm 25 and the main swing arm 22, the connecting shaft 255 slides along the sliding slot 2231 of the second clamping portion 223. In the process of the movement of the main swing arm 22, two supporting positions always exist, one supporting position is provided by the mounting seat 212 shown in fig. 4, and the other supporting position is provided by the connecting shaft 255, so that the mounting seat 212 and the connecting shaft 255 can provide stable support for the main swing arm 22, and the stability of the main swing arm 22 in the movement process is improved.

As shown in fig. 9, the rotating body 252 has an elongated structure, and both end surfaces of the rotating body 252 are fixed to both notch side walls 2515 of the rotating portion notch 2512, respectively. Thereby, the lateral size of the torsion swing arm 25 can be reduced, thereby saving the space occupied by the folding mechanism 20 in the width direction F of the foldable cellular phone. As shown in fig. 11a, the rotating bodies 252 of the two torsion swing arms 25 are symmetrical about the center of the base 21.

As shown in fig. 10b, the side surface of the rotating body 252 includes a first acting surface 2521, a second acting surface 2522, a third connection surface 2524 and a first connection surface 2523, which are sequentially connected to each other, and the first acting surface 2521 is connected to the third connection surface 2524. As shown in fig. 11a, when the foldable phone is in a flat state, the first active surface 2521 is in contact with the upper fixing plate 241 of the supporting body 24.

As shown in fig. 10b, the second acting surface 2522 includes a first plane 2525, an arc surface 2526, and a second plane 2527 connected in sequence, where the first plane 2525 and the second plane 2527 are both tangent to the arc surface 2526, the first plane 2525 is connected to the first acting surface 2521, and the second plane 2527 is connected to the third connecting surface 2524.

As shown in fig. 11a, a portion of the rotator 252 extends into the groove 246, and when the foldable mobile phone is in a flat state, the first acting surface 2521 abuts against the lower surface 2413 of the upper fixing plate 241. Thus, the rotating body 252 can provide a force to the supporting body 24 to move away from the base 21, so that the upper surface of the upper fixing plate 241 and the upper surface of the torsion swing arm 25 are located on the same plane, and together provide a support for the flexible screen 30 (not shown in fig. 11 a). As shown in fig. 11b, the first active surface 2521 can be a plane, so that when the foldable handset is in a flat state, the cooperation between the first active surface 2521 and the upper fixing plate 241 is plane-to-plane. Thus, the first active surface 2521 can provide stable support to the upper fixing plate 241.

Fig. 11c is a schematic structural diagram of the folding mechanism 20 when the foldable mobile phone is folded to 100 °, and as shown in fig. 11c, in the folding process of the foldable mobile phone, the first rotating shaft 232 rotates around its axis, and the torsion swing arm 25 rotates along with the first rotating shaft 232, so the rotation center of the torsion swing arm 25 is the axis of the first rotating shaft 232, and the rotation center of the rotating body 252 is also the axis of the first rotating shaft 232. During the rotation of the rotating body 252 around the axis of the first rotating shaft 232, as shown in fig. 11d, the arc surface 2526 gradually contacts the lower fixing plate 242; the foldable mobile phone continues to be folded, the rotator 252 continues to rotate, the arc surface 2526 of the right rotator 252 rotates towards the lower right, the arc surface 2526 is always tangent to the upper surface 2421 of the lower fixing plate 242, and provides a force for the lower fixing plate 242 to move towards the base 21, and the lower fixing plate 242 can move towards the base 21, i.e. towards the direction away from the flexible screen 30 (not shown in fig. 11 d).

The rotor 252 continues to rotate until the foldable handset is in the folded position. As shown in fig. 11e and 11f, when the foldable mobile phone is folded to the folded state, the first plane 2525 of the rotator 252 still abuts against the lower fixing plate 242, so as to continuously provide a force to the supporting body 24 in a direction toward the base 21. Since the first plane 2525 and the upper surface 2421 of the lower fixing plate 242 are both planes, the action between the rotating body 252 and the lower fixing plate 242 is a plane-to-plane action, so that the rotating body 252 can provide a stable acting force to the lower fixing plate 242 through the first plane 2525 and suspend the supporting body 24 to the position, thereby making the supporting body 24 avoid the bending region of the flexible screen 30 (not shown in fig. 11e and 11 f). Because the folding mechanism 20 of the embodiment of the present application does not need to use a spring, and a space required by the spring when the spring is compressed to the limit is not required to be reserved, that is, the embodiment of the present application can save a space in the thickness direction G of the foldable mobile phone, so as to further reduce the thickness of the foldable mobile phone.

During the unfolding process of the foldable mobile phone, as shown in fig. 11c, the right rotator 252 rotates clockwise along with the first rotating shaft 232, when the rotator 252 rotates until the first acting surface 2521 contacts with the lower surface 2413 of the upper fixing plate 241, the rotator 252 continues to rotate, so that the rotator 252 can provide a force for the upper fixing plate 241 to move away from the base 21, and when the foldable mobile phone is in the unfolded state, the upper fixing plate 241 can move under the action of the rotator 252 until its upper surface is flush with the upper surface of the torsion swing arm 25.

As shown in fig. 11a, the third connection surface 2524 of the rotating body 252 is a surface facing the first rotating shaft 232, and when the torsion swing arm 25 is fixed on the first rotating shaft 232, the third connection surface 2524 and the first rotating shaft 232 contact each other or have a gap, so that interference between components can be avoided, and the torsion swing arm 25 and the first rotating shaft 232 can be assembled conveniently.

In another embodiment of the present application, the difference from the embodiment shown in fig. 10a is the structure of the rotating body 252. Specifically, as shown in fig. 13, the rotating body 252 includes a third connecting surface 2524, a first connecting surface 2523, a first operating surface 2521 and a second connecting surface 2528, which are connected in sequence, and the third connecting surface 2524 is connected to the second connecting surface 2528. The first working surface 2521 is an arc surface.

As shown in fig. 14a, when the foldable phone is in a flat state, the first active surface 2521 abuts against the lower surface 2413 of the upper fixing plate 241. During the process of folding the foldable mobile phone, as shown in fig. 14b, the rotating body 252 rotates along with the first rotating shaft 232, and the rotating body 252 moves until the first acting surface 2521 abuts against the upper surface 2421 of the lower fixing plate 242; the rotating body 252 continues to rotate, so as to provide a force to the lower fixing plate 242 towards the base 21, the lower fixing plate 242 moves towards the base 21 under the action of the force, until the foldable mobile phone is in the folded state, the rotating body 252 stops moving, the lower fixing plate 242 also stops moving, and the rotating body 252 continues to provide a force to the lower fixing plate 242, so that the lower fixing plate 242 hovers at the position, thereby avoiding the bending area of the flexible screen 30 (not shown in fig. 14 a).

In another embodiment of the present application, the difference from the embodiment shown in fig. 3 is the structure of the upper fixing plate 241 of the supporting body 24, the number of the first rotating parts 251 and the rotating bodies 252 in the torsion swing arm 25, and the structure of the connecting plate 254.

Specifically, as shown in fig. 15a and 15b, the upper fixing plate 241 is a strip structure, the upper fixing plate 241 may include a fixing body 2411 and four protrusions 2412 located at the side of the fixing body 2411, the number of the protrusions 2412 at one side of the fixing body 2411 is two, and the two protrusions 2412 are arranged along the side of the fixing body 2411. In other embodiments, the number of the protrusions 2412 on one side of the fixing body 2411 may be three or more.

Correspondingly, referring to fig. 15a, in the present embodiment, the number of the first rotating portions 251 and the rotating bodies 252 in the torsion swing arm 25 is the same as the number of the protruding portions 2412 arranged on one side of the upper fixing plate 241, and both are two. Specifically, the two first rotating portions 251 and the rotating body 252 are arranged in line in the length direction E. The connection plate 254 has a large connection area and connects the two first and second

rotating portions

251 and 253.

In the present embodiment, as shown in fig. 15a, since the length of the supporting body 24 is longer, the contact area between the supporting body 24 and the flexible screen 30 (not shown in fig. 15 a) is larger, and thus more stable support can be provided for the flexible screen 30.

In still another embodiment of the present application, the difference from the embodiment shown in fig. 11a is the structure of the first rotating portion 251 and the rotating body 252 on the supporting body 24 and the torsion swing arm 25. Specifically, as shown in fig. 16, the support body 24 includes an upper fixing plate 241, a lower fixing plate 242, a vertical fixing plate 243, and two side fixing plates 244, the upper fixing plate 241 and the lower fixing plate 242 are parallel to each other, the vertical fixing plate 243 is fixed between the upper fixing plate 241 and the lower fixing plate 242, and the vertical fixing plates 243 are perpendicular to both the upper fixing plate 241 and the lower fixing plate 242. The lower fixing plate 242 is closer to the base 21 than the upper fixing plate 241. Two side fixing plates 244 are fixed to both sides of the upper and

lower fixing plates

241 and 242, respectively, and each of the side fixing plates 244 may form a receiving cavity 245 with a closed side and two open ends with the upper and

lower fixing plates

241 and 242, so that two receiving cavities 245 are formed on the supporting body 24.

As shown in fig. 17, the first rotating portion 251 has a first side surface 2513 facing away from the second rotating portion 253, the first side surface 2513 is a flat surface, and the rotating body 252 is fixed on the first side surface 2513 of the first rotating portion 251.

As shown in fig. 17, the rotating body 252 includes a connection member 2529 and a fixing post 2530, wherein the connection member 2529 is fixed on the first side surface 2513, and the fixing post 2530 is fixed on a surface of the connection member 2529 facing the supporting body 24. The connecting member 2529 may have an elongated plate-like structure. As shown in fig. 18, the longitudinal direction of the connecting member 2529 extends in the direction of the support body 24.

As shown in fig. 17, one end of the fixing post 2530 is fixed to the connection member 2529. As shown in fig. 18, the other end of the fixing post 2530 extends into the accommodating cavity 245 of the supporting body 24, and when the foldable mobile phone is in the unfolded state, the fixing post 2530 abuts against the lower surface 2413 of the upper fixing plate 241, so that the fixing post 2530 can provide a force for the supporting body 24 to move away from the base 21, and the supporting body 24 can provide a support for the flexible screen 30 (not shown in fig. 17). During the process of folding the foldable mobile phone, the rotator 252 rotates along with the first rotating shaft 232, and when the rotator 252 moves to a position where the surface of the rotator 252 abuts against the upper surface 2421 of the lower fixing plate 242, the rotator 252 continues to rotate, so as to provide a force to the lower fixing plate 242 towards the base 21, and the lower fixing plate 242 moves towards the base 21 under the action of the force. Until the foldable mobile phone is in the folded state, the rotating body 252 stops moving, the lower fixing plate 242 also stops moving, and the rotating body 252 can continuously provide acting force for the lower fixing plate 242, so that the lower fixing plate 242 can hover at the position, and the bending area of the flexible screen 30 is avoided. Because the folding mechanism 20 of the embodiment of the present application does not need to use a spring, and the space required by the spring when the spring is compressed to the limit does not need to be reserved, that is, the embodiment of the present application can save the space in the thickness direction G of the foldable mobile phone, so as to further reduce the thickness of the foldable mobile phone.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims

1. A folding mechanism, comprising:

a base;

the supporting body is connected to the base and provided with a first groove and a second groove which correspond to each other in position, and the supporting body can move towards or away from the base;

the first swing arm comprises a first rotating part and a first rotating body fixed on the first rotating part, the first rotating part is rotatably connected to the base, part of the first rotating body extends into the first groove, and the first rotating body is configured to provide acting force for the supporting body in the rotating process so as to enable the supporting body to move towards or away from the base;

the second swing arm, the second swing arm includes the second and rotates the portion and be fixed in second rotor on the second rotation portion, the second rotation portion is connected with rotatable mode on the base, the part of second rotor stretch into to the second inslot, the configuration of second rotor is for at the pivoted in-process, for the supporter provides the effort, so that the supporter orientation or keeping away from the base motion.

2. The folding mechanism of claim 1 wherein the support body includes first and second opposing retaining plates and a third retaining plate connected between the first and second retaining plates, the third retaining plate dividing a space between the first and second retaining plates into the first and second slots.

3. The folding mechanism of claim 2 wherein said second stationary plate is closer to said base than said first stationary plate, said second stationary plate having a dimension in a first direction that is greater than a dimension of said first stationary plate in said first direction, said first direction being a direction in which said first swing arm and said second swing arm are aligned.

4. The folding mechanism of claim 2 or 3, wherein said first stationary plate has a first surface facing said second stationary plate;

the first rotating body comprises a first acting surface, and when the first swing arm and the second swing arm are in a flattening state, the first acting surface is abutted to the first surface.

5. The folding mechanism of claim 4, wherein said second stationary plate has a second surface facing said first stationary plate;

the first rotating body further comprises a second acting surface connected with the first acting surface, and the second acting surface acts with the second surface in the folding process of the first swing arm and the second swing arm.

6. The folding mechanism of claim 4 wherein said first active surface includes a first planar surface.

7. A folding mechanism according to claim 5, wherein said second active surface comprises a second planar surface, said second planar surface being connected to said first active surface, said second planar surface abutting said second surface when said first and second swing arms are in the folded configuration.

8. The folding mechanism of claim 7 wherein said second active surface further includes a first arcuate surface connected to said second planar surface and projecting outwardly therefrom.

9. The folding mechanism of claim 8 wherein said second active surface further comprises a third planar surface connected to said first arcuate surface, said third planar surface further configured such that a portion of said third planar surface abuts said second surface when said first swing arm and said second swing arm are in a flattened position.

10. The folding mechanism of claim 5 wherein said first active surface and said second active surface are joined to form a second arcuate surface that interacts with said second surface during folding of said first swing arm and said second swing arm; and in the process of unfolding the first swing arm and the second swing arm, the second cambered surface is acted with the first surface.

11. A folding mechanism according to claim 3, wherein said first rotating body comprises a connecting member and a fixing member fixed to said connecting member, at least a portion of said fixing member extending into said first slot, said fixing member being adapted to provide said support body with a force towards or away from said base during rotation.

12. The folding mechanism of claim 11 wherein said connecting member is located on a side of said support body, said securing member being disposed toward said side, said side being a surface adjacent to a side on which said first swing arm is located.

13. The folding mechanism according to claim 2, wherein a first side surface of the first rotating portion is provided with a first cutout, a portion of the first rotating body protrudes into the first cutout, and the first side surface is a surface of the first rotating portion opposite to the second rotating portion when the first swing arm and the second swing arm are in the flat state.

14. The folding mechanism of claim 13 wherein said first cutout has two opposing side walls, said first rotor being secured to said two side walls.

15. The folding mechanism of claim 13 or 14 wherein said first retaining plate includes a retaining body and a boss secured to one side of said retaining body, a portion of said boss extending into said first cutout.

16. The folding mechanism of claim 14 wherein a first through hole is provided in a second side surface of said first rotating portion, said second side surface being contiguous with said first side surface, said first cutout being in communication with said first through hole;

the first rotating body is also provided with a connecting surface facing the first through hole, and the projection of the connecting surface on the side wall is in contact with or provided with a gap between the projection edges of the side wall of the first through hole.

17. The folding mechanism of any of claims 1 to 3, wherein the number of said first rotating bodies is plural, the number of said first grooves is plural, and there are at least two of said first rotating bodies in one-to-one correspondence with two of said first grooves;

and/or, the quantity of second rotor is a plurality of, the quantity of second groove is a plurality of, exists at least two the second rotor with two the second groove one-to-one.

18. A folding mechanism according to claim 3, further comprising a third swing arm slidably connected to said base along an arcuate surface, said third swing arm being aligned with said first swing arm along a second direction, and said third swing arm being connected to said first swing arm such that said third swing arm moves relative to said base in a synchronized manner with said first swing arm;

and/or the folding mechanism further comprises a fourth swing arm which is connected to the base in a manner of sliding along a cambered surface; the fourth swing arm and the second swing arm are arranged along the second direction and are connected so that the fourth swing arm and the second swing arm can move relative to the base in a synchronous manner;

the second direction is perpendicular to both the movement direction of the support body and the first direction.

19. The folding mechanism of claim 18 wherein a first chute is provided on a surface of said third swing arm facing said first swing arm;

the first swing arm further comprises a third rotating portion fixed on the first rotating portion and a first connecting shaft connected to the third rotating portion in a rotatable mode, and the first connecting shaft extends into the first sliding groove.

20. The folding mechanism of claim 18 or 19 wherein a second chute is provided on a surface of said fourth swing arm facing said second swing arm;

the second swing arm further comprises a fourth rotating portion fixed on the second rotating portion and a second connecting shaft connected to the fourth rotating portion in a rotatable mode, and the second connecting shaft extends into the second sliding groove.

21. A folding mechanism according to any of claims 3, 11 or 12, wherein said first and second swing arms are symmetrical about a central plane of said support, said central plane being a plane perpendicular to said first direction and located at the geometric centre of said support.

22. A terminal device, characterized in that the terminal device comprises a folding mechanism according to any one of claims 1-21.